Technical Field
The utility model relates to a height-adjustable cross-cutting and conveying device for corrugated plastic sheets, belonging to the field of plastic machinery. During the production of corrugated plastic sheets from powder raw materials, the device is used to transversely cut longitudinally divided corrugated sheets, so as to ensure both longitudinal and transverse dimensions of corrugated sheets meet requirements.
Background Art
At present, after transverse cutting in corrugated plastic sheet production, cut sheets directly fall into disordered material receiving bins and generally require subsequent manual sorting and arrangement. This leads to high labor consumption and low efficiency.In view of the current situation of corrugated plastic sheet manufacturing machinery, there is an urgent demand for a height-adjustable cross-cutting and conveying device capable of automatically collecting, arranging and neatly stacking cut corrugated sheets.
Contents of the Utility Model
The objective of the utility model is to provide a height-adjustable cross-cutting and conveying device for corrugated plastic sheets to overcome the deficiencies of existing corrugated plastic sheet manufacturing equipment. The device can realize automatic collection and arrangement with neat stacking effect.
The technical solution is described as follows. The device comprises a cross-cutting conveying frame, a cross-cutting unit and a conveying unit.
The cross-cutting conveying frame includes cross beams, vertical plates, pushing mounting plates, lifting drive plates, conveying drive plates, No.Ⅰ L-shaped plates, carrier rollers, pushing guide rails, pushing sliding blocks and supports.There are five cross beams numbered Nhl1, Nhl2, Nhl3, Nhl4 and Nhl5 respectively. Two ends of cross beams Nhl1 and Nhl2 are fixed to two ends of one long edge of two vertical plates. The two vertical plates are parallel, aligned and perpendicular to the two cross beams.Cross beams Nhl3 and Nhl4 are fixed between the middle positions of the short edges of the two vertical plates. Both Nhl3 and Nhl4 are perpendicular to the plate surfaces of the vertical plates. Nhl3 and Nhl1 are arranged on the same short edge of the vertical plates, while Nhl2 and Nhl4 are arranged on the other short edge.Cross beam Nhl5 is fixed between the two vertical plates at the end of the vertical plate short edge fitted with Nhl3 away from Nhl1.A pushing mounting plate is fixed at the middle of Nhl3. The plate surface of the pushing mounting plate is parallel to the plane formed by Nhl1 and Nhl2 and perpendicular to the length direction of the cross beams.A lifting drive plate is fixed at the middle of Nhl4, and its plate surface is parallel to that of the pushing mounting plate.A conveying drive plate is fixed on the inner plate surface of one vertical plate, with its plate surface parallel to that of the pushing mounting plate.The short legs of two No.Ⅰ L-shaped plates are fixed to the outer sides of two ends of Nhl5, and the long legs extend upward. Two ends of each carrier roller are supported at the tail ends of the long legs of the two No.Ⅰ L-shaped plates. The axis of each carrier roller is parallel to the length direction of the cross beams.One pushing guide rail is mounted along one long edge of each vertical plate on the side close to Nhl5. Two pushing sliding blocks are fitted onto the two pushing guide rails. The back plate surface of each sliding block away from the guide rail is parallel to the pushing mounting plate.Supports are installed at both ends of Nhl1 and Nhl2, and the whole frame is placed on the ground via the four supports.
The cross-cutting unit includes a cross-cutting frame, backing plates, pushing cylinders, synchronous drive assemblies, cutter supporting assemblies, pressing plate assemblies and cross-cutting protective covers.The cross-cutting frame comprises horizontal beams, No.Ⅱ L-shaped plates, pressing cylinder mounting plates and shifting plates. There are five horizontal beams numbered Nhg1, Nhg2, Nhg3, Nhg4 and Nhg5.An L-shaped No.Ⅱ plate is formed by bending one edge of a rectangular flat plate into a right angle, and a rectangular hole is formed on one long edge of the No.Ⅱ L-shaped plate away from the bent long edge.Two ends of Nhg1 and Nhg2 are fixed to the rectangular plate surfaces of two No.Ⅱ L-shaped plates near the bent sections. The bent sections of the two No.Ⅱ L-shaped plates face inward. The two No.Ⅱ L-shaped plates are parallel, aligned and perpendicular to the two horizontal beams.In the direction parallel to the plate surface of the bent section of each No.Ⅱ L-shaped plate, Nhg1 is arranged along one edge perpendicular to the rectangular plate surface and the bent plate surface, and Nhg2 is arranged at the middle of the rectangular plate surface.Horizontal beams Nhg3 and Nhg4 are fixed between the middle positions of two edges perpendicular to the rectangular plate surface and bent plate surface of the two No.Ⅱ L-shaped plates. Both Nhg3 and Nhg4 are perpendicular to the plate surfaces of No.Ⅱ L-shaped plates. Nhg3 and Nhg1 are arranged on the same short edge of the No.Ⅱ L-shaped plates.Horizontal beam Nhg5 is fixed between the two No.Ⅱ L-shaped plates at the middle of the other edge parallel to the bent section. Two pressing cylinder mounting plates are fixed on the surface of Nhg5 away from the bent sections of the No.Ⅱ L-shaped plates.A shifting plate is fixed between the middle sections of Nhg1 and Nhg2. The plate surface of the shifting plate is perpendicular to the plane formed by Nhg1 and Nhg2 and perpendicular to the plate surfaces of No.Ⅱ L-shaped plates.The cross-cutting frame is mounted on the upper surfaces of the two pushing sliding blocks of the cross-cutting conveying frame via the bent plate surfaces of the two No.Ⅱ L-shaped plates. Backing plates are installed on the plane of Nhg1 and Nhg2 on the side close to Nhg5.The pushing cylinder is mounted on the pushing mounting plate of the cross-cutting conveying frame. The tail end of the telescopic rod of the pushing cylinder is installed at the end of the shifting plate away from Nhg5.
Each synchronous drive assembly includes a synchronous driver, right-angle plates, synchronous pulleys, U-shaped seats, tension screws, synchronous belts, drive protective covers and tension protective covers.The synchronous driver is mounted on the outer plate surface of one No.Ⅱ L-shaped plate via a right-angle plate. The axis of the output shaft of the synchronous driver is parallel to both the plate surface and the bent plate surface of the No.Ⅱ L-shaped plate.A synchronous pulley is installed on the extending end of the output shaft of the synchronous driver toward the rectangular hole of the No.Ⅱ L-shaped plate.Another synchronous pulley is installed at the rectangular hole on the outer plate surface of the other No.Ⅱ L-shaped plate via a U-shaped seat and tensioned by tension screws. The axes of the two synchronous pulleys are parallel.The synchronous belt passes through the rectangular holes on the two No.Ⅱ L-shaped plates and is sleeved on the two synchronous pulleys respectively.A drive protective cover is arranged on the outer plate surface of the No.Ⅱ L-shaped plate fitted with the synchronous driver corresponding to the synchronous pulley. A tension protective cover is arranged on the outer plate surface of the No.Ⅱ L-shaped plate fitted with the U-shaped seat corresponding to the synchronous pulley.
Each cutter supporting assembly includes cutter guide rails, cutter holders, cutter sliding blocks, belt pressing plates, cutters and cutter pressing plates.The cutter guide rail is installed on the plane of Nhg4 of the cross-cutting frame on the side close to Nhg3.The cutter holder is formed by bending two parts of its plate surface into a right angle. A cutter sliding block is fixed on one plate surface of the cutter holder away from the edge of the other plate surface, and the cutter holder is mounted on the cutter guide rail via the cutter sliding block.One side of the cutter holder plate fitted with the cutter sliding block is pressed against the lower section of the synchronous belt of the synchronous drive assembly by a belt pressing plate.Two cutters are clamped on the other plate surface of the cutter holder via cutter pressing plates, with the cutting edges extending downward.
Each pressing plate assembly includes pressing cylinders and pressing plates. Two pressing cylinders are installed on the upper surfaces of the two pressing cylinder mounting plates of the cross-cutting frame, with telescopic rods extending downward. Two ends of each pressing plate are hinged to the tail ends of the telescopic rods of the two pressing cylinders. A cross-cutting protective cover is arranged above the cross-cutting unit.
The conveying unit includes a conveying frame, conveying drive assemblies and height adjustment assemblies.The conveying frame includes H-frames, support arms, sliding groove lugs, connecting frames, lifting lugs, pin shafts, longitudinal beams and connecting lugs.Two support arms extend outward from the middle of one vertical arm of each H-frame and lie on the same plane as the H-plane of the H-frame.A sliding groove lug with a sliding groove is fixed at the end of the middle cross arm of the H-frame close to the support arms. The sliding groove of the sliding groove lug is parallel to the H-plane of the H-frame.Two lifting lugs are arranged on one plate surface of the connecting frame provided with a round hole. The connecting frame is hinged on the extending end of the pin shaft passing through the sliding groove lug via the two lifting lugs.Two longitudinal beams are installed at two ends of the two vertical arms of the H-frame. The two longitudinal beams are aligned and lie on the H-plane of the H-frame. A long groove is formed at the end of each longitudinal beam away from the support arms. One connecting lug is arranged on the outer side of each longitudinal beam close to the support arms.The conveying frame is hinged to the middle sections of the two vertical plates of the cross-cutting conveying frame near the pushing guide rails via the two connecting lugs.
Each conveying drive assembly includes short rollers, sprockets, long rollers, conveying belts, tension wheels, conveying drivers and chains.One end of each of the two short rollers is supported at the end of the longitudinal beam fitted with the connecting lug, and the other end is supported at the tail end of each support arm. A sprocket is mounted on the shaft between one end of one short roller and the longitudinal beam.Two ends of each long roller are supported inside the long grooves at one end of the two longitudinal beams. Multiple conveying belts are evenly sleeved on the long roller and the two short rollers respectively.Tension wheels of the same quantity as the conveying belts are installed on the vertical arms of the H-frame of the conveying frame on the side away from the support arms.The conveying driver with another sprocket mounted on its output shaft is installed on the conveying drive plate of the cross-cutting conveying frame. The two sprockets lie on the same plane and are sleeved with a chain.
Each height adjustment assembly includes a lifting driver and a lifting screw rod. The lifting driver is installed on the lifting drive plate of the cross-cutting conveying frame. The upward end of the lifting screw rod screwed into the output hole of the lifting driver is hinged inside the round hole of the connecting frame of the conveying frame.
On the basis of the prior art, the cross-cutting conveying frame is configured with five cross beams numbered Nhl1, Nhl2, Nhl3, Nhl4 and Nhl5. Two ends of Nhl1 and Nhl2 are fixed to two ends of one long edge of two parallel vertical plates perpendicular to the cross beams.Nhl3 and Nhl4 are mounted between the middle parts of vertical plate short edges and perpendicular to vertical plate surfaces. Nhl3 and Nhl1 are on one short edge, and Nhl2 and Nhl4 are on the other short edge. Nhl5 is fixed between vertical plates at the vertical plate short edge fitted with Nhl3 away from Nhl1.A pushing mounting plate is fixed on Nhl3, parallel to the plane of Nhl1 and Nhl2. A lifting drive plate parallel to the pushing mounting plate is fixed on Nhl4. A conveying drive plate parallel to the pushing mounting plate is fixed on one vertical plate.The short legs of two No.Ⅰ L-shaped plates are fixed to two ends of Nhl5 with long legs extending upward. Carrier rollers are supported at the tops of the long legs, and roller axes are parallel to cross beams.Pushing guide rails are arranged along one long edge of each vertical plate near Nhl5. Pushing sliding blocks are fitted on the guide rails. Supports are arranged at both ends of Nhl1 and Nhl2 for ground placement.
The cross-cutting frame of the cross-cutting unit adopts five horizontal beams Nhg1, Nhg2, Nhg3, Nhg4 and Nhg5. No.Ⅱ L-shaped plates are formed by bending rectangular plates, each with a rectangular hole.Two ends of Nhg1 and Nhg2 are fixed to two No.Ⅱ L-shaped plates with bent sections facing inward. Nhg1 is arranged along one edge of each No.Ⅱ L-shaped plate, and Nhg2 is arranged at the plate middle.Nhg3 and Nhg4 are fixed between the No.Ⅱ L-shaped plates and perpendicular to their surfaces. Nhg5 is fixed between the two No.Ⅱ L-shaped plates, and two pressing cylinder mounting plates are arranged on Nhg5.A shifting plate perpendicular to the beam plane and L-shaped plate surface is fixed between Nhg1 and Nhg2. The cross-cutting frame is mounted on pushing sliding blocks via bent sections of No.Ⅱ L-shaped plates. Backing plates are fitted on Nhg1 and Nhg2 close to Nhg5. The pushing cylinder is mounted on the pushing mounting plate, and its telescopic rod is connected to the shifting plate.
For the synchronous drive assembly, the synchronous driver is mounted on one No.Ⅱ L-shaped plate via a right-angle plate. A synchronous pulley is fitted on its output shaft. A matched synchronous pulley is installed on the other No.Ⅱ L-shaped plate via a U-shaped seat and tension screws. A synchronous belt passes through rectangular holes on the L-shaped plates and connects the two pulleys. Protective covers are arranged corresponding to each pulley.
The cutter guide rail of the cutter supporting assembly is installed on Nhg4. The bent cutter holder is mounted on the guide rail via cutter sliding blocks. One side of the cutter holder is clamped with the synchronous belt by a belt pressing plate. Two cutters are fixed on the cutter holder with cutting edges downward.Two pressing cylinders on the pressing plate assembly drive the pressing plate to move up and down. A cross-cutting protective cover is arranged above the whole cross-cutting unit.
The H-frame of the conveying frame is provided with outward-extending support arms. A sliding groove lug is arranged on the middle cross arm of the H-frame. The connecting frame with lifting lugs is hinged to the pin shaft passing through the sliding groove lug. Longitudinal beams are installed at both ends of H-frame vertical arms, with long grooves formed at one end and connecting lugs at the other end. The whole conveying frame is hinged to vertical plates of the cross-cutting conveying frame via connecting lugs.
Short rollers and long rollers of the conveying drive assembly support multiple conveying belts. Tension wheels are arranged on the H-frame. The conveying driver drives the rollers via a chain and matched sprockets.The lifting driver of the height adjustment assembly is mounted on the lifting drive plate. The lifting screw rod connects the lifting driver and the connecting frame of the conveying frame to realize angle adjustment of the conveying unit.
Working Principle
Initially, the cutters of the cutter supporting assembly of the cross-cutting unit are positioned on one side of the cross-cutting width close to the No.Ⅱ L-shaped plates. The telescopic rods of the pressing cylinders of the pressing plate assembly retract to lift the pressing plate. The telescopic rod of the pushing cylinder retracts and pulls the cross-cutting unit back to the initial cross-cutting position.
Corrugated plastic sheets longitudinally divided by the preceding slitting unit are fed between the backing plate of the cross-cutting unit and the pressing plate via the carrier rollers of the cross-cutting conveying frame, and the height-adjustable cross-cutting and conveying device is started.When the longitudinal length of the passing corrugated sheet reaches the preset value, the telescopic rods of the pressing cylinders extend, and the corrugated sheet is pressed onto the carrier rollers of the cross-cutting conveying frame by the pressing plate.At the same time, the telescopic rod of the pushing cylinder extends and pushes the cross-cutting unit to run synchronously at the same speed as the corrugated sheet. The synchronous driver of the synchronous drive assembly is activated. It drives the cutter holder, cutter sliding blocks and cutters of the cutter supporting assembly to transversely travel along the cutter guide rails via synchronous pulleys and synchronous belts. When the cutters travel from the side close to the No.Ⅱ L-shaped plates to the opposite side, the corrugated sheet is transversely cut off.
The synchronous driver stops rotating and the cutters finish cutting. The telescopic rods of the pressing cylinders retract again to lift the pressing plate. The telescopic rod of the pushing cylinder retracts and pulls the cross-cutting unit back to the initial cross-cutting position. The above operations repeat when the longitudinal length of the subsequent sheet reaches the set value.
Meanwhile, the cut corrugated sheets fall onto the conveying belts of the conveying unit and are transported into the material receiving bin at the tail end of the conveying belts (not shown in drawings).The material receiving bin adopts a six-sided box structure without a top plate and a side plate close to the conveying unit, so the tail section of the conveying unit can extend into the bin.When only a small number of sheet layers are stacked in the bin, the lifting driver of the height adjustment assembly automatically lowers the tail height of the conveying unit. As the stacking height increases with more sheets, the lifting driver reverses automatically and continuously raises the tail height of the conveying unit to ensure neat stacking of corrugated sheets.When the bin is fully loaded, it can be quickly pulled out and replaced to realize non-stop continuous operation.
Compared with existing equipment in the industry, the utility model has the following advantages:The extension of the pushing cylinder telescopic rod enables synchronous movement matching the traveling speed of corrugated sheets. Therefore, transverse cutting can be completed while the sheet is clamped by the pressing plate, guaranteeing clean cuts and accurate dimensions.The conveying unit can automatically adjust the tail height of the conveying belt according to the number of stacked sheet layers inside the material receiving bin and can stretch into the bin. It achieves neat stacking of transversely cut corrugated sheets, improves production efficiency and saves massive labor.
